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Prothena – $155 Million Shelf-Takedown Offering

San Francisco – March 23, 2017 – Cooley advised the underwriter on Prothena’s $155.3 million shelf-takedown offering of 2,700,000 ordinary shares. The underwriter has a 30-day option to purchase 405,000 additional ordinary shares.

Cantor Fitzgerald & Co. was the sole underwriter for the offering.

Prothena, which trades on The NASDAQ Global Select Market as “PRTA,” is a global, late-stage clinical biotechnology company with a clinical pipeline of novel therapeutic antibodies. Prothena is establishing a fully integrated research, development and commercial focus and has advanced several drug candidates into clinical studies while pursuing discovery of additional novel therapies.

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